CN207047131U - A kind of equipment for producing melamine - Google Patents
A kind of equipment for producing melamine Download PDFInfo
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- CN207047131U CN207047131U CN201720480313.0U CN201720480313U CN207047131U CN 207047131 U CN207047131 U CN 207047131U CN 201720480313 U CN201720480313 U CN 201720480313U CN 207047131 U CN207047131 U CN 207047131U
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- cooler
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- melamine
- cyclone separator
- cooling medium
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Abstract
Molten salt furnace, carrier gas preheater, reactor, hot gas cooler, hot-air filter, gas-solid cooler, cyclone separator, cooling medium circulating pump, cooling medium surge tank a kind of to produce the equipment of melamine, including be linked in sequence successively；The fused salt groove and carrier gas preheater, reactor for being provided with pump for liquid salts are connected between molten salt furnace and carrier gas preheater, cyclone separator bottom is connected with melamine cooler, described melamine cooler one end is connected with cyclone separator, the other end is connected with gas-solid cooler, it is also sequentially connected with cooling medium circulating pump and cooling medium surge tank simultaneously, the other end and finished product bin and automatic packaging machine system are sequentially connected with, and is sequentially connected with respectively with finished filter and Carrier Gas Compressor at the top of cyclone separator.The utility model reduces the washing of liquid urine and cold air compression section device compared with existing equipment, melamine production device is had the characteristics that facility compact, flow are short, product quality is stable, energy consumption is low, reduced investment, cost are low.
Description
Technical field
It the utility model is related to the production equipment of chemical field, mainly melamine.
Background technology
The equipment that present gas phase quenching process melamine process uses for：The process gas come out from urea washes tower is through carrier gas
Compressor boosts to 0.1~2.5MPa, into carrier gas preheater, is heated by fused salt, and carrier gas temperature rises to 360~400 DEG C, from
Reactor bottom enters reactor through gas distributor.For reactor built with catalyst, liquid urinates pump by 130~145 DEG C of temperature
Fusing urea is sent into reactor through urea nozzle, is atomized urea using atomization gas, the urea sprayed into reactor, 390 ±
At 20 DEG C of temperature and carrier gas, catalyst action, urea reaction generation melamine, ammonia and carbon dioxide.There is cyclonic separation in reactor
Device, separate the catalyst carried secretly in gas, the heat needed for urea reaction generation melamine, by the fused salt being immersed in catalyst layer
Fused salt in heating tube provides.
NH3, CO2, melamine and accessory substance and catalyst particles are mainly contained in the reaction generation gas come out from reactor head
Grain etc., cooled down into hot gas cooler with road life, generation gas is cooled to 300~350 DEG C, is come out from hot gas cooler
The reaction generation gas of the thing solid particle of deamination containing melamine and catalyst fines, into hot-air filter, hot-air filter is one
There are much screen pipes with keel rotary counter-blowing bag filter or triple valve blowback, the inside, and the screen pipe in filter is equal
It is divided into some groups, blowback, the preferred ammonia of blowback air is carried out with blowback air.
The reaction generation gas of melamine deamination products and catalyst fines has been separated, has entered crystallizer from top.Melamine crystallizes
Required cooling gas, from Cool gas blower, 130~160 DEG C of temperature, sprayed upwards from the cold air spout of crystallizer bottom.Mixing
Temperature degree is down to 180~220 DEG C, and the melamine crystallization that reaction is generated in gas separates out, descending in the lump with gas, flows to crystallizer and goes out
Mouthful.
The technique mixed gas containing melamine powder come from crystallizer outlet, into trap, melamine and process gas
Separate, the melamine isolated has compression coil to draw off in cyclone separator bottom, into packaging system, is packaged as finished product.
Process gas at the top of from cyclone separator out enters urea washes top of tower, with urea solution urine scrubbing tower tower reactor
Watery fusion urea is squeezed into urea washes tower through urea cycle pump, top, and process gas and urine contact, cocurrent are changed downwards
Heat and washing, gas are down to 130~150 DEG C from 180~220 DEG C, and the process gas for going out urea washes tower enters through gas-liquid separator
The liquid urine droplet carried secretly in row separating technology gas；Heat exchanger tube in urea washes tower is exchanged heat with desalted water to give, in heat exchanger tube
Desalted water absorb 0.05-0.4MPa steam can be produced after heat, caused steam does other purposes or into air cooler,
Steam is cooled to liquid by air, makes its circulation in the heat exchanger tube for flowing into the heat exchanging segment, to the process gas in urea washes tower
Cooling.
The process gas come out from gas-liquid separator is divided into three parts, is partly into Carrier Gas Compressor, as anti-after boosting
The fluidized carrier gas of device is answered, is partly into Cool gas blower, cold air is used as after boosting, into crystallizer, Part III is tail gas, is sent
Enter and be out-of-bounds used for producing the products such as ammonium hydrogen carbonate, urea, soda ash, liquefied ammonia, ammonium nitrate.The position of Carrier Gas Compressor and Cool gas blower
All both can be respectively between cyclone separator and liquid urine scrubbing tower, can also be after the gas vent that liquid urinates scrubbing tower.
Heat required for reaction has molten salt furnace offer, and pump for liquid salts provides power, makes fused salt in molten salt furnace, reactor, melts
Circulated between salt bath.
In a kind of melaming manufacturing process disclosed in the patent of the patent No. 95104455.9 and its equipment, using recirculating fluidized bed knot
Brilliant device, because melamine particles are thin, viscosity is big, so melamine is easily adhered on heat exchanger tube when recirculating fluidized bed fluidizes, cause to change
The thermal efficiency declines, until heat exchange can not be carried out, while also easily blocks the dipleg of recirculating fluidized bed internal cyclone, it is difficult to realize just
Often production..
The content of the invention
To solve the deficiency of above-mentioned technique, the utility model provides a kind of production equipment of melamine.
The technical scheme is that：A kind of equipment for producing melamine, it is characterised in that：It is molten including what is be linked in sequence successively
Salt stove, carrier gas preheater, reactor, hot gas cooler, hot-air filter, gas-solid cooler, cyclone separator, cooling medium follow
Ring pump, cooling medium surge tank；The fused salt groove for being provided with pump for liquid salts is connected between molten salt furnace and carrier gas preheater and carrier gas is pre-
Hot device, reactor, cyclone separator bottom are connected with melamine cooler, and described melamine cooler one end connects with cyclone separator
Connect, the other end is connected with gas-solid cooler, while it is also sequentially connected with, separately with cooling medium circulating pump and cooling medium surge tank
One end is sequentially connected with finished product bin and automatic packaging machine system, at the top of cyclone separator respectively with finished filter and carrier gas pressure
Contracting machine is sequentially connected with.
Gas-solid cooler bottom described in the utility model is provided with the gas jet device of Venturi tube structure.
Gas-solid cooler described in the utility model is vertical or tilts installation, and inside is not added with internals, and top adds heat-exchanger rig.
Melamine cooler described in the utility model uses the indirect type of cooling, preferably spiral jacket cooler or hollow
Oar blade type cooler.
Finished filter described in the utility model uses rotary counter-blowing filter.
The utility model is used for using urea as raw material next life honey production amine, and lacking of being carried secretly in gas is filtered out from finished filter
After measuring melamine, most of gas enters the fluidized carrier gas as reactor after Carrier Gas Compressor boosting, and the carrier gas after boosting enters
Carrier gas preheater is preheating to 350-400 DEG C, and subsequently into reactor, urea is sprayed into fluidized-bed reactor, in fluidized carrier gas and
The catalytic action of catalyst, reaction generation melamine, ammonia and carbon dioxide under 340-450 DEG C, 0.1-3.5MPa pressure, from reaction
The process gas that device comes out enters hot gas cooler（6）, process gas is cooled to 300-360 DEG C by cooling medium, it is cooled
Process gas filters into hot-air filter, and the process gas after filtering enters gas-solid cooler, and the cooling medium of gas-solid cooler is adopted
With cold melamine solid, cold melamine mixes with the process gas of the gas containing melamine and is cooled to 140-250 in gas-solid cooler
DEG C, the melamine gas in process gas is sublimated for melamine solid, the process gas and melamine for going out gas-solid cooler enter whirlwind together
Separator, cyclone separator bottom are provided with melamine cooler, and the solid melamine isolated enters the melamine of cyclone separator bottom
Cooler arrangement, melamine is cooled down by water or conduction oil, the temperature of melamine is cooled to 120 DEG C -200 from 140 DEG C -250 DEG C
DEG C, most of melamine after cooling enters gas-solid cooler as cooling medium, cools down the process gas come from hot-air filter, follows
Ring cools down, and a small amount of melamine transports out in another outlet of melamine cooler, into finished product bin, is then packaged as product；Separation
The process gas gone out after melamine out enters finished filter at the top of cyclone separator, filters out a small amount of honey carried secretly in gas
After amine, it is divided into two-way：Gas enters the fluidized carrier gas as reactor after Carrier Gas Compressor boosting all the way；Another way is produced for reaction
Raw tail gas, go out melamine production device and be used for producing other products such as urea, ammonium hydrogen carbonate, soda ash, ammonium nitrate or liquefied ammonia.
The cooling medium of the utility model melamine cooler is water or conduction oil, the temperature of melamine be cooled to 120 DEG C-
200℃。
The utility model gas-solid cooler solid melamine cooling technique gas, the temperature of charge for going out gas-solid cooler are 140
℃-250℃。
The temperature of charge that the utility model goes out melamine cooler is 120 DEG C -200 DEG C.
The utility model gas-solid cooler construction is that venturi mixer is arranged at bottom, and top can both not have heat exchanger tube,
There can be heat exchanger tube to cool to gas-solid mixture.From hot-air filter come process gas in gas-solid cooler with cold solid
Melamine contacts, and cools by cold melamine, and make the melamine in process gas have gaseous state to sublimate herein and crystallized out for solid-state.
The beneficial effects of the utility model are：The utility model compared with existing equipment, reduce liquid urine washing and it is cold
Air pressure contracting process device, make melamine production device have facility compact, flow are short, product quality is stable, energy consumption is low, reduced investment,
The features such as cost is low.
Brief description of the drawings
Fig. 1 is the utility model part-structure schematic diagram.
Fig. 2 is the utility model part-structure schematic diagram.
Fig. 1 and Fig. 2 generally produces the device structure schematic diagram of melamine, label in figure：1 is molten salt furnace, and 2 be fused salt groove, 3
It is carrier gas preheater for pump for liquid salts, 4,5 be reactor, and 6 be hot gas cooler, and 7 be hot-air filter, and 8 be road raw food condenser（Or
The cooler of other heat transferring mediums）, 9 be crystallizer, and 10 be trap, and 11 be agitator, and 12 be compression coil discharger, and 13 are
Finished product bin, 14 be roof scrubber, and 15 be that liquid urinates scrubbing tower, and 16 be gas-liquid separator, and 17 be that liquid urinates circulating pump, and 18 be foam removal
Device, 19 be Cool gas blower, and 20 be Carrier Gas Compressor, and 21 be steam buffer tank, and 22 be automatic packaging machine system, and 23 be that gas-solid cools down
Device, 24 be cyclone separator, and 25 be melamine cooler, and 26 be circulating pump, and 27 be cooling medium surge tank, and 28 be finished product mistake
Filter.
Embodiment
The present invention will be described in detail with specific embodiment below in conjunction with the accompanying drawings：
A kind of equipment and its technique for producing melamine of example 1
The utility model include be linked in sequence successively molten salt furnace 1, carrier gas preheater 4, reactor 5, hot gas cooler 6,
Hot-air filter 7, gas-solid cooler 23, cyclone separator 24, cooling medium circulating pump 26, cooling medium surge tank 27；Fused salt
The fused salt groove 2 and carrier gas preheater 4 for being provided with pump for liquid salts 3, the bottom of cyclone separator 24 are connected between stove 1 and carrier gas preheater 4
Portion is connected with melamine cooler 25, and described one end of melamine cooler 25 is connected with cyclone separator 24, and the other end is cold with gas-solid
But device 23 is connected, while it is also sequentially connected with cooling medium circulating pump 26 and cooling medium surge tank 27, the other end and finished product
Feed bin 13 and automatic packaging machine system 22 are sequentially connected with, and the top of cyclone separator 24 is compressed with finished filter 28 and carrier gas respectively
Machine 20 is sequentially connected with.
The bottom of gas-solid cooler 23 described in the utility model is provided with the gas jet device of Venturi tube structure.
The some processes gas that the utility model goes out finished filter 28 does reactor fluidisation through the boosting of Carrier Gas Compressor 20
Carrier gas, the carrier gas after boosting are preheating to 360-400 DEG C of carrier gas urea into carrier gas preheater 4 and sprayed into fluidized-bed reactor,
The catalytic action of catalyst, reaction generation melamine, ammonia and carbon dioxide under 340-450 DEG C, 0.1-3.5MPa pressure, from reaction
The process gas that device 5 comes out enters hot gas cooler 6, process gas is first cooled to 300-350 DEG C, cooled process gas entered
Filter filtering 7, the process gas after filtering enters gas-solid cooler 23, and cooling medium uses cold melamine solid, is cooled down in gas-solid
Cold melamine makes the melamine gas in process gas sublimate with the process gas combination cooling of the gas containing melamine to 140-250 DEG C in device
For melamine solid, the process gas and melamine for going out gas-solid cooler 23 enter cyclone separator 24 together, and cyclone separator bottom is set
There is melamine cooler 25, the solid melamine isolated enters the melamine cooler 25 of cyclone separator bottom, passes through water or heat conduction
Oil cools down melamine, the temperature of melamine is cooled to 120 DEG C -200 DEG C from 140 DEG C -250 DEG C, most of melamine after cooling enters
Enter gas-solid cooler 23 and be used as cooling medium, cool down the process gas come from hot-air filter, melamine recycles, and a small amount of melamine exists
Another outlet of melamine cooler 25 transports out, and enters finished product bin 13 as product, is then packaged as product；Isolate melamine
Process gas afterwards out enters finished filter 28 from the top of cyclone separator 24, filters out a small amount of honey carried secretly in gas
Amine, then gas be divided into two-way:The fluidized carrier gas circulation that gas enters after Carrier Gas Compressor 20 boosts as reactor all the way makes
With another way gas is tail gas, goes out melamine production device, for producing urea, ammonium hydrogen carbonate, soda ash, ammonium nitrate or liquefied ammonia etc.
Product.
The blowback system of hot-air filter 7 and finished filter 28 all uses automatic rotary back-blowing device, and purge gas is used
Ammonia or carbon dioxide.
Example 2：A kind of equipment and its technique for producing melamine
The process gas temperature for going out finished filter 28 is 200-210 DEG C, 0.5 ± 0.1MPa of pressure, into Carrier Gas Compressor
20, the technique carrier gas for entering reactor is pressurized to by Carrier Gas Compressor by 0.75MPa, it is pre- that the process gas after pressurization enters carrier gas
Hot device 4, reactor 5 is entered after process gas is heated to 380 ± 10 DEG C with high-temperature molten salt, Alusil catalysis is filled with reactor
Agent, the gas into reactor make catalyst be in fluidized state, and external urea is sprayed into reactor by urea nozzle, and nozzle is used
Atomization gas is atomized to urea, and it is in spray pattern to make it into reactor, and the temperature in reactor is 390 DEG C, and urea enters
Reaction generates melamine, ammonia, carbon dioxide and a small amount of accessory substance after entering reactor, has cyclone separator in reactor, separates gas
The catalyst carried secretly in body；Heat needed for urea reaction generation melamine, by being immersed in the fused salt heating tube in catalyst layer
Fused salt provide, fused salt circulated by pump for liquid salts between fused salt heating furnace, reactor, carrier gas preheater, fused salt groove.
NH3, CO2, melamine and accessory substance and catalyst particles are mainly contained in the reaction generation gas come out from reactor head
Grain etc., is cooled down into hot gas cooler 6, and generation gas is cooled to 335 DEG C -340 DEG C, and hot gas cooler is band evaporating space
Tubular heat exchanger, gas walks tube side, and shell side cooling medium is given birth to road, and the road life for absorbing heat is evaporated to gas, and road anger is entered
Take part in Taoism raw and cold condenser 8, be condensed into liquid with the life of Shui Ba roads, condensed road life is flowing back into hot gas cooler 6, road life circulation profit
With.The reaction of the thing of deamination containing melamine and catalyst fines that are come out from hot gas cooler generates gas, into hot-air filter 7, heat
Air filter 7 is a rotary counter-blowing bag filter, and there are much screen pipes with keel, filter bag glass fibre in the inside
Felt, the screen pipe in filter are divided into some groups, blowback are carried out with ammonia.
The temperature for going out the reaction generation gas of hot-air filter 7 is 330 DEG C, subsequently into the bottom of gas-solid cooler 23, work
Skill gas mixes with the temperature of melamine cooler 25 for 160 DEG C of melamines, flows up, cold melamine drops to process gas
205-210 DEG C, the gaseous state melamine in process gas is sublimated as solid-state herein, and the process gas after cooling enters together with melamine
Cyclone separator 24, solid melamine, which is separated, to discharge, and gas enters finished filter 28, mistake from the top discharge of cyclone separator
Gas after filter is partly into Carrier Gas Compressor 20, and a part goes out melamine device for tail gas, produces other products.Cyclonic separation
The melamine that device 24 separates enters melamine cooler 25, is cooled down indirectly with water, melamine temperature is dropped to 160 DEG C, after cooling
Melamine largely enter gas-solid cooler 23, on a small quantity as product feeding packaging system.
The process gas temperature control of hot gas cooler gives birth to back liquid temperature degree to control by road, and liquid temperature Du You roads raw food is given birth to back in road
The pressure that condenser produces steam is controlled, and the pressure of road raw food condenser producing steam controlled by automatic regulating valve.
The temperature control of gas-solid cooler has the temperature of solid melamine to control, and the temperature of solid melamine is by controlling melamine
The steam pressure of the cooling medium surge tank 27 of the byproduct steam of cooler 25, so as to reach the purpose of the temperature of control melamine.
The effect of above-mentioned production process is as follows：（In terms of the consumption of melamine per ton）
| Sequence number | Project name | Unit | Existing process | This patent technique |
| 1 | Power consumption | KW.h/t | 700-800 | 380 |
| 2 | By-product 0.5MPa steam | t/t | 0 | 1 |
| 3 | Excellence rate | % | 85 | 98 |
| 4 | Urea consumes | t/t | 3.0 | 2.95 |
| 5 | Molten salt furnace fuel consumption | Gcal/t | 3.2 | 2.4 |
| 6 | Investment | Wan Yuan（In terms of producing 50000 tons of melamine scales per year） | 18000 | 12000 |
| 7 | Device continuous operating time | My god | 80-100 | 150-180 |
Above example is merely to illustrate the present invention, is not intended to limit the invention, and comes for those skilled in the art
Say, the present invention there can be various modifications and variations.All any modifications within the spirit and scope of the present invention principle, made,
Equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (5)
- A kind of 1. equipment for producing melamine, it is characterised in that：Including the molten salt furnace being linked in sequence successively（1）, carrier gas preheater （4）, reactor（5）, hot gas cooler（6）, hot-air filter（7）, gas-solid cooler（23）, cyclone separator（24）, melamine Cooler（25）, cooling medium circulating pump（26）, cooling medium surge tank（27）；Molten salt furnace（1）And carrier gas preheater（4）Between It is connected with and pump for liquid salts is installed（3）Fused salt groove（2）And carrier gas preheater（4）, reactor（5）, cyclone separator（24）Bottom It is connected with melamine cooler（25）, described melamine cooler（25）One end and cyclone separator（24）Connection, the other end and gas Gu cooler（23）Be connected, at the same it also with cooling medium circulating pump（26）With cooling medium surge tank（27）It is sequentially connected with, separately One end and finished product bin（13）With automatic packaging machine system（22）It is sequentially connected with, cyclone separator（24）Top respectively with finished product mistake Filter（28）And Carrier Gas Compressor（20）It is sequentially connected with.
- A kind of 2. equipment for producing melamine according to claim 1, it is characterised in that：Described gas-solid cooler（23）Bottom Portion is provided with the gas jet device of Venturi tube structure.
- A kind of 3. equipment for producing melamine according to claim 1, it is characterised in that：Described gas-solid cooler（23）Hang down Straight or inclination installation, inside are not added with internals, and top adds heat-exchanger rig.
- A kind of 4. equipment for producing melamine according to claim 1, it is characterised in that：Described melamine cooler（25）For The indirect type of cooling, using spiral jacket cooler or hollow paddle type cooler.
- A kind of 5. equipment for producing melamine according to claim 1, it is characterised in that：Described finished filter（28）Band There is back-blowing device, from rotary counter-blowing filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720480313.0U CN207047131U (en) | 2017-05-03 | 2017-05-03 | A kind of equipment for producing melamine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720480313.0U CN207047131U (en) | 2017-05-03 | 2017-05-03 | A kind of equipment for producing melamine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207047131U true CN207047131U (en) | 2018-02-27 |
Family
ID=61490222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720480313.0U Active CN207047131U (en) | 2017-05-03 | 2017-05-03 | A kind of equipment for producing melamine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207047131U (en) |
-
2017
- 2017-05-03 CN CN201720480313.0U patent/CN207047131U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shandong xinhuizhihuan Technology Co.,Ltd. Assignor: Xi Yunzhu Contract record no.: X2021370000023 Denomination of utility model: Equipment for producing melamine Granted publication date: 20180227 License type: Common License Record date: 20210802 |
|
| EE01 | Entry into force of recordation of patent licensing contract |